Corner slab



Nov. 16,1926. 1,606,882

- F. LECHTENBERG ET AL CORNER SLAB Filed NOV. 15, 1923 x n Flillwmwcoz s FRED LICHTENBERG MICHAEL M. MQCARTHY Patented Nov. l6, 1926.

hairs earner FRED LICHTENBERG AND MICHAEL M. IYICCART O YGNKERS, NEW YORK.

CORNER SLAB.

Application filed November 15, 1923. Serial No. 674,795.

This invention relates particularly to building structures of the type disclosed in our Patents #1,l10,932 and 1306,9539, in which the walls are made up of precast, reinforced concrete slabs placed on end and bonded together in edge to edge relation. In making corners with these slabs the practice has been to bring the end slabs of the angularly related walls as closely together as possible and then complete the joint at the corner with the material which is used for bonding the slabs in their straight edge to edge relation. The strength of such a corner depends upon the skill and conscientiousness of the worker and at best is liable to deteriorate with the weather and in some instances to crack or open up with the settling of the walls.

The objects of our invention are to overcome or eliminate the faults and objections encountered in such prior methods of construction and to provide a corner unitary and complete in itself, ready to be set up at the wall junctions and to form there a tight,

secure corner, tying the walls together and actually reinforcing the same.

In the drawings accompanying and forming part of this specification the invention is illustrated in several of its different forms, but it is to be understood that the structure may be modified in various other respects without departure from the true spirit and scope of the invention as hereinafter defined and claimed.

Figure 1 is a sectional perspective of a form of concrete slab for use at the junction of two angularly related walls.

Figure 2 somewhat diagrammatic view illustrating the use of the corner slab shown in Figure 1.

Figure 3 is a similar view of a cross form of corner slab for joining four meeting walls.

The body of the slab is made of a suitably proportioned concrete cast in molds or otherwise shaped to produce the desired number and extent of angularly related walls or wings. Thus for a simple corner slab only two angularly related wings are necessary such as indicated at 5 and 6 in Figure 2; for three abutting walls the slab will be of T cross section with three angularly related walls, and for four meeting walls the slab will be of quadrangular cross shape, as in Figure 3, with four angularly related wings 5, 6, 7 and 8. These slabs may be cast for is a broken perspective and' any desired height of wall so as to provide a solid, continuous tight corner the full height of the wall.

These full-length corner slabs are made possible partly because of the special reinforcement embodying a single continuous sheet of reinforcing fabric which is folded double to extend in spaced layers through the several angles of the slab. Thus in the simplest form shown in Figure 1, the wire cloth or sheet of reinforcingfabric is folded to form two angularly related layers '9, 10, substantially parallel to the outer faces of the wings and connected by a looped portion 11 with the angularly related layers12,

13 substantially parallel to the inner faces- 7 layers is shown as extended beyond the end of the one wing 5 and correspondingly the spaced ends 16, 17 of the sheet are shown as extended beyond the end of the other wing 6. These end extensions provide means for bonding the wings of the corner slab with the end slabs of the corner walls with which the corner slab is used.

In Figure 2 wall slabs such as covered in our prior patents are shown at 18 having doubled layers of reinforcing fabric embedded therein with projecting folded ends 19 and spaced ends 20. This view illustrates how with such slabs a very efiective bonding can be secured by setting up the slabs so that the projecting separated ends 20 of the reinforcement of one wall slab fit over the projecting loop 11 of the corner reinforcement and thespaced ends 16, 17 of the corner reinforcement fit over the projecting folded end 19 of the reinforcement in the end slabof the other wall. When these overlapping bonding elements are filled over with mortar or other suitable bonding agent, such as indicated at 21, it will be seen that the corner walls will be most effectively tied together and bonded by the integral corner slab into a substantially unitary structure. v

The reinforcing fabric may be of any suitable weave. or construction, but for our purposes it has been found particularly desirable to use a fabric made up of long1tudinal Wires 22 connected at intervals in spaced relation by lateral wires 23 wrapped bent alternately to opposite sides of the center so as to form divergent arms overstanding the divergent outer sides of the reinforcement. These arms may be. mechanically connected with the embedded reinforcement by forming them at their ends with slots 27 to hook over the lateral wires 23. Keying openings 28 are shown provided in the sides of the corner bead.

When molding a corner slab with a corner head the corner bead may be hooked on the reinforcement before the latter is placed in the mold or the bead may be dropped in the mold and then the reinforcement simply be put in place thereover and the hold of the concrete be relied upon to secure the bead firmly in position.

As an additionalffeatur'e the outside of the corner may be formed with raised portions 29 to provide a gage or ground for the first orrrough coat of plaster which is indicated at 30. The corner bead provides a gage for the finish plaster coat 31 so that this corner structure has the further advantage of facilitating the subsequentplastering operations.

The same principles of reinforcement are carrled out in the three :and four wall corner slabs, as illustrated in Figured The reinforcement isthe same as in the simple corner slab, except that where the additional projectingwing 7 is provided the reinforcement is continued through this wing in relatively spaced layers-32, 33, connected by a looped portion 34 projecting beyond the edge of th1s wmg for bonding connec Simt tion with'the end of the third wall. larly, doubled layers 35, 36' of the reinforcement are embeddedin the fourth wing 8 and the loop 87 connecting these layersis pro ected beyond the edge of the wing for bonding with the fourth wall.

The reinforcement in each form of slab can be produced simply and inexpensively bybending up a single sheetof reinforce- .ment fabric through the required number of angles to produce the desired spaced layers connected by'the protruding bends on in spaced layers and folded in conformity with the angular outline of the block, said angularly related spaced layers being embedded in the angularly related walls of the block with parts projecting beyond the ends of such walls and providing means carried by and integral with the corner block for bonding the same with angularly related corner Walls of a building structure.

2. The combination of claim 1 in, which 7 the block is elongated vertically in the form of a slab and in which angularly related portions of the reinforcingfabric are connected together across the corners of the slab by diagonally extending ties. V

3. A precast corner slab reinforced by a single sheet of reinforcing fabric doubled in spaced layers and folded in conformity with the angular outline of the block, said angularly related spaced layers being embedded in the angularly related walls of the slab with parts projecting beyond the ends of such walls and providing means carried by and integral with the corner slab for bonding the same with angularly related corner walls of a building structure and a corner bead embedded in the corner portion of the slab and forming an integral part of the'same. V

4. The structure of claim 3 in which the corner bead has parts extending into the body of the blockand interlocked with the reinforcing fabric. 7 V

.5. The structureof'claim 3 in which the corner bead has divergent sides engaged with angularly related side portions of the embedded reinforcing fabric.

6. The structure of claim 3 in which the corner bead projectsfsufliciently to form a gage for a finish coat of plaster and in from one angular wall of the block and the V doubled portion of the fabric projects from another angular wall of the block.

8. Aprecast concrete column having integrally united angularly relatedwings for joinder with theends'of angularly related corner Walls of a building structure, said angularly related wings having a continuous sheet of reinforcing fabric embedded therein with spaced layers of the same angled to follow the angular section of the column with portions of such spaced layers projecting beyond the edges of the angularly related wings to provide bonding means for the adjoining wall sections.

9. A precast concrete column having integrally united angnlarly related wings for joinder with the ends of angularly related corner walls of a building structure, said angularly related wings having reinforcing fabric embedded therein with spaced layers of the same angled to follow the angular sec- 15 tion of the column with portions of such spaced layers projecting beyond the edges of the angularly related wings to provide bonding means for the adjoining wall sections.

In witness whereof, we have hereunto set 20 our hands this 31st day of October 1923.

FRED LICHTENBERG. MICHAEL M. MoGARTI-IY. 

